<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>love++</title>
 
    <style>
        html, body {
 
            width: 500px;
            height:300px;
            left:50px;
            top:30px;
            margin: 100px 289px;
            background: #f6d8e2;
        }
        pp1{
            position: absolute;
            top: 20px;
            left: 20px;
        }
        canvas {
            position: absolute;
            width: 1000px;
            height: 500px;
            left:135px;
            top:50px;
        }</style>
    <link href="css/default.css" type="text/css" rel="stylesheet">
    <script type="text/javascript" src="a.js"></script>
 
    <script language="javascript" type="text/javascript">
 
        // 18秒以后再跳转
        setTimeout("javascript:location.href='./index.html'", 15000);
    </script>
 
</head>
 
<div id="myContent"></div>
<div id="contentToWrite" class="comments" style="display:none;">舔狗一无所有</div>
<script type="text/javascript"> writeContent(true); </script>
</body>
<body>
 
<canvas id="pinkboard"></canvas>
 
<script>
    /*
     * Settings
     */
    var settings = {
        particles: {
            length:   500, // maximum amount of particles
            duration:   2, // particle duration in sec
            velocity: 100, // particle velocity in pixels/sec
            effect: -0.75, // play with this for a nice effect
            size:      30, // particle size in pixels
        },
    };
 
    /*
     * RequestAnimationFrame polyfill by Erik M?ller
     */
    (function(){var b=0;var c=["ms","moz","webkit","o"];for(var a=0;a<c.length&&!window.requestAnimationFrame;++a){window.requestAnimationFrame=window[c[a]+"RequestAnimationFrame"];window.cancelAnimationFrame=window[c[a]+"CancelAnimationFrame"]||window[c[a]+"CancelRequestAnimationFrame"]}if(!window.requestAnimationFrame){window.requestAnimationFrame=function(h,e){var d=new Date().getTime();var f=Math.max(0,16-(d-b));var g=window.setTimeout(function(){h(d+f)},f);b=d+f;return g}}if(!window.cancelAnimationFrame){window.cancelAnimationFrame=function(d){clearTimeout(d)}}}());
 
    /*
     * Point class
     */
    var Point = (function() {
        function Point(x, y) {
            this.x = (typeof x !== 'undefined') ? x : 0;
            this.y = (typeof y !== 'undefined') ? y : 0;
        }
        Point.prototype.clone = function() {
            return new Point(this.x, this.y);
        };
        Point.prototype.length = function(length) {
            if (typeof length == 'undefined')
                return Math.sqrt(this.x * this.x + this.y * this.y);
            this.normalize();
            this.x *= length;
            this.y *= length;
            return this;
        };
        Point.prototype.normalize = function() {
            var length = this.length();
            this.x /= length;
            this.y /= length;
            return this;
        };
        return Point;
    })();
 
    /*
     * Particle class
     */
    var Particle = (function() {
        function Particle() {
            this.position = new Point();
            this.velocity = new Point();
            this.acceleration = new Point();
            this.age = 0;
        }
        Particle.prototype.initialize = function(x, y, dx, dy) {
            this.position.x = x;
            this.position.y = y;
            this.velocity.x = dx;
            this.velocity.y = dy;
            this.acceleration.x = dx * settings.particles.effect;
            this.acceleration.y = dy * settings.particles.effect;
            this.age = 0;
        };
        Particle.prototype.update = function(deltaTime) {
            this.position.x += this.velocity.x * deltaTime;
            this.position.y += this.velocity.y * deltaTime;
            this.velocity.x += this.acceleration.x * deltaTime;
            this.velocity.y += this.acceleration.y * deltaTime;
            this.age += deltaTime;
        };
        Particle.prototype.draw = function(context, image) {
            function ease(t) {
                return (--t) * t * t + 1;
            }
            var size = image.width * ease(this.age / settings.particles.duration);
            context.globalAlpha = 1 - this.age / settings.particles.duration;
            context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size);
        };
        return Particle;
    })();
 
    /*
     * ParticlePool class
     */
    var ParticlePool = (function() {
        var particles,
            firstActive = 0,
            firstFree   = 0,
            duration    = settings.particles.duration;
 
        function ParticlePool(length) {
            // create and populate particle pool
            particles = new Array(length);
            for (var i = 0; i < particles.length; i++)
                particles[i] = new Particle();
        }
        ParticlePool.prototype.add = function(x, y, dx, dy) {
            particles[firstFree].initialize(x, y, dx, dy);
 
            // handle circular queue
            firstFree++;
            if (firstFree   == particles.length) firstFree   = 0;
            if (firstActive == firstFree       ) firstActive++;
            if (firstActive == particles.length) firstActive = 0;
        };
        ParticlePool.prototype.update = function(deltaTime) {
            var i;
 
            // update active particles
            if (firstActive < firstFree) {
                for (i = firstActive; i < firstFree; i++)
                    particles[i].update(deltaTime);
            }
            if (firstFree < firstActive) {
                for (i = firstActive; i < particles.length; i++)
                    particles[i].update(deltaTime);
                for (i = 0; i < firstFree; i++)
                    particles[i].update(deltaTime);
            }
 
            // remove inactive particles
            while (particles[firstActive].age >= duration && firstActive != firstFree) {
                firstActive++;
                if (firstActive == particles.length) firstActive = 0;
            }
 
 
        };
        ParticlePool.prototype.draw = function(context, image) {
            // draw active particles
            if (firstActive < firstFree) {
                for (i = firstActive; i < firstFree; i++)
                    particles[i].draw(context, image);
            }
            if (firstFree < firstActive) {
                for (i = firstActive; i < particles.length; i++)
                    particles[i].draw(context, image);
                for (i = 0; i < firstFree; i++)
                    particles[i].draw(context, image);
            }
        };
        return ParticlePool;
    })();
 
    /*
     * Putting it all together
     */
    (function(canvas) {
        var context = canvas.getContext('2d'),
            particles = new ParticlePool(settings.particles.length),
            particleRate = settings.particles.length / settings.particles.duration, // particles/sec
            time;
 
        // get point on heart with -PI <= t <= PI
        function pointOnHeart(t) {
            return new Point(
                180 * Math.pow(Math.sin(t), 3),
                160 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25
            );
        }
 
        // creating the particle image using a dummy canvas
        var image = (function() {
            var canvas  = document.createElement('canvas'),
                context = canvas.getContext('2d');
            canvas.width  = settings.particles.size;
            canvas.height = settings.particles.size;
            // helper function to create the path
            function to(t) {
                var point = pointOnHeart(t);
                point.x = settings.particles.size / 2 + point.x * settings.particles.size / 350;
                point.y = settings.particles.size / 2 - point.y * settings.particles.size / 350;
                return point;
            }
            // create the path
            context.beginPath();
            var t = -Math.PI;
            var point = to(t);
            context.moveTo(point.x, point.y);
            while (t < Math.PI) {
                t += 0.01; // baby steps!
                point = to(t);
                context.lineTo(point.x, point.y);
            }
            context.closePath();
            // create the fill
            context.fillStyle = '#fa759f';
            context.fill();
            // create the image
            var image = new Image();
            image.src = canvas.toDataURL();
            return image;
        })();
 
        // render that thing!
        function render() {3
            5.
            // next animation frame
            requestAnimationFrame(render);
 
            // update time
            var newTime   = new Date().getTime() / 1000,
                deltaTime = newTime - (time || newTime);
            time = newTime;
 
            // clear canvas
            context.clearRect(0, 0, canvas.width, canvas.height);
 
            // create new particles
            var amount = particleRate * deltaTime;
            for (var i = 0; i < amount; i++) {
                var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
                var dir = pos.clone().length(settings.particles.velocity);
                particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y);
            }
 
            // update and draw particles
            particles.update(deltaTime);
            particles.draw(context, image);
        }
 
        // handle (re-)sizing of the canvas
        function onResize() {
            canvas.width  = canvas.clientWidth;
            canvas.height = canvas.clientHeight;
        }
        window.onresize = onResize;
 
        // delay rendering bootstrap
        setTimeout(function() {
            onResize();
            render();
        }, 50);
    })(document.getElementById('pinkboard'));</script>
 
</body>
 
</html>
 